add set backlight color function

olikraus · May 17, 2020 · f06f7d2 · f06f7d2
1 parent 9a478cb
commit f06f7d2
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Showing 6 changed files with 54 additions and 3 deletions.
diff --git a/cppsrc/U8g2lib.h b/cppsrc/U8g2lib.h
@@ -124,6 +124,9 @@ class U8G2 : public Print
  void setContrast(uint8_t value) {
  u8g2_SetContrast(&u8g2, value); }
 
+ void setBacklightColor(uint32_t value) {
+ u8g2_SetBacklightColor(&u8g2, value); }
+
  void setDisplayRotation(const u8g2_cb_t *u8g2_cb) {
  u8g2_SetDisplayRotation(&u8g2, u8g2_cb); }
 

diff --git a/cppsrc/U8x8lib.h b/cppsrc/U8x8lib.h
@@ -247,6 +247,9 @@ class U8X8 : public Print
  void setContrast(uint8_t value) {
  u8x8_SetContrast(&u8x8, value); }
 
+ void setBacklightColor(uint32_t value) {
+ u8x8_SetBacklightColor(&u8x8, value); }
+
  void setInverseFont(uint8_t value) {
  u8x8_SetInverseFont(&u8x8, value); }
 

diff --git a/csrc/u8g2.h b/csrc/u8g2.h
@@ -375,6 +375,7 @@ struct u8g2_struct
 #define u8g2_SetPowerSave(u8g2, is_enable) u8x8_SetPowerSave(u8g2_GetU8x8(u8g2), (is_enable))
 #define u8g2_SetFlipMode(u8g2, mode) u8x8_SetFlipMode(u8g2_GetU8x8(u8g2), (mode))
 #define u8g2_SetContrast(u8g2, value) u8x8_SetContrast(u8g2_GetU8x8(u8g2), (value))
+#define u8g2_SetBacklightColor(u8g2, value) u8x8_SetBacklightColor(u8g2_GetU8x8(u8g2), (value))
 //#define u8g2_ClearDisplay(u8g2) u8x8_ClearDisplay(u8g2_GetU8x8(u8g2)) obsolete, can not be used in all cases
 void u8g2_ClearDisplay(u8g2_t *u8g2);
 

diff --git a/csrc/u8x8.h b/csrc/u8x8.h
@@ -43,6 +43,7 @@
  U8X8_MSG_DISPLAY_SET_FLIP_MODE
  U8X8_MSG_DISPLAY_SET_POWER_SAVE
  U8X8_MSG_DISPLAY_SET_CONTRAST
+ U8X8_MSG_DISPLAY_SET_BACKLIGHT_COLOR
  U8X8_MSG_DISPLAY_DRAW_TILE
 
  A display driver may decided to breakdown these messages to a lower level interface or
@@ -91,6 +92,9 @@
 /* Undefine this to remove u8x8_SetContrast function */
 #define U8X8_WITH_SET_CONTRAST
 
+/* Undefine this to remove u8x8_SetBacklightColor function */
+#define U8X8_WITH_SET_BACKLIGHT_COLOR
+
 /* Define this for an additional user pointer inside the u8x8 data struct */
 //#define U8X8_WITH_USER_PTR
 
@@ -471,6 +475,15 @@ void u8x8_d_helper_display_init(u8x8_t *u8g2);
 /* arg_int: 0..255 contrast value */
 #define U8X8_MSG_DISPLAY_SET_CONTRAST 14
 
+/*
+ Name: U8X8_MSG_DISPLAY_SET_BACKLIGHT_COLOR
+ Args: arg_ptr: color: 24-bit RGB
+ Tasks:
+ Set the color of the backlight. The dsplay driver might transform the given
+ 24-bit RGB color into the more limited color space of the backlight.
+ */
+#define U8X8_MSG_DISPLAY_SET_BACKLIGHT_COLOR 15
+
 /*
  Name: U8X8_MSG_DISPLAY_DRAW_TILE
  Args: 
@@ -498,7 +511,7 @@ void u8x8_d_helper_display_init(u8x8_t *u8g2);
  ABABAB. Totally, cnt*arg_int tiles will be drawn. 
  
 */
-#define U8X8_MSG_DISPLAY_DRAW_TILE 15
+#define U8X8_MSG_DISPLAY_DRAW_TILE 16
 
 
 /*
@@ -515,7 +528,7 @@ void u8x8_d_helper_display_init(u8x8_t *u8g2);
  void u8x8_RefreshDisplay(u8x8_t *u8x8)
  to send the message to the display handler.
 */
-#define U8X8_MSG_DISPLAY_REFRESH 16
+#define U8X8_MSG_DISPLAY_REFRESH 17
 
 /*==========================================*/
 /* u8x8_setup.c */
@@ -555,6 +568,7 @@ void u8x8_InitDisplay(u8x8_t *u8x8);
 void u8x8_SetPowerSave(u8x8_t *u8x8, uint8_t is_enable);
 void u8x8_SetFlipMode(u8x8_t *u8x8, uint8_t mode);
 void u8x8_SetContrast(u8x8_t *u8x8, uint8_t value);
+void u8x8_SetBacklightColor(u8x8_t *u8x8, uint32_t color);
 void u8x8_ClearDisplayWithTile(u8x8_t *u8x8, const uint8_t *buf) U8X8_NOINLINE;
 void u8x8_ClearDisplay(u8x8_t *u8x8); // this does not work for u8g2 in some cases
 void u8x8_FillDisplay(u8x8_t *u8x8);

diff --git a/csrc/u8x8_d_e3keys.c b/csrc/u8x8_d_e3keys.c
@@ -63,6 +63,7 @@ static const u8x8_display_info_t u8x8_e3keys_sb6432_display_info =
 
 
 #define E3KEYS_AT_CMD_SET_DISPLAY_ADDR_WRITE_DATA 0x40
+#define E3KEYS_AT_CMD_SET_RGB_COLOR 0x42
 #define E3KEYS_AT_CMD_END_TRANSMISSION 0x43
 
 #define E3KEYS_AT_EXT_CMD_START 0x47
@@ -105,6 +106,10 @@ static const uint8_t u8x8_d_e3keys_sb6432_powersave1_seq[] = {
 
 uint8_t u8x8_d_e3keys_sb6432(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
 {
+#ifdef U8X8_WITH_SET_BACKLIGHT_COLOR
+ uint32_t color;
+ uint8_t color_bytes[3];
+#endif
  const u8x8_display_info_t *d_info = u8x8->display_info;
  u8x8_tile_t *tile;
  const uint16_t y_addr_offset = d_info->pixel_height / 8;
@@ -124,6 +129,26 @@ uint8_t u8x8_d_e3keys_sb6432(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *a
  else
  u8x8_cad_SendSequence(u8x8, u8x8_d_e3keys_sb6432_powersave0_seq);
  break;
+#ifdef U8X8_WITH_SET_BACKLIGHT_COLOR
+ case U8X8_MSG_DISPLAY_SET_BACKLIGHT_COLOR:
+ color = *((uint32_t *) arg_ptr);
+ /*
+ * Set RGB Color command data layout:
+ * Red: 0 D_6 D_5 D_4 D_3 D_2 D_1 D_0
+ * Green: 0 D_6 D_5 D_4 D_3 D_2 D_1 D_0
+ * Blue: 0 D_6 D_5 D_4 D_3 D_2 D_1 D_0
+ */
+ color_bytes[0] = (color >> 16) & 0x7f; /* red */
+ color_bytes[1] = (color >> 8) & 0x7f; /* green */
+ color_bytes[2] = color & 0x7f; /* blue */
+
+ u8x8_cad_StartTransfer(u8x8);
+ u8x8_cad_SendCmd(u8x8, E3KEYS_AT_CMD_SET_RGB_COLOR);
+ u8x8_cad_SendData(u8x8, 3, color_bytes);
+ u8x8_cad_SendCmd(u8x8, E3KEYS_AT_CMD_END_TRANSMISSION);
+ u8x8_cad_EndTransfer(u8x8);
+ break;
+#endif
  case U8X8_MSG_DISPLAY_DRAW_TILE:
  tile = (u8x8_tile_t *)arg_ptr;
 

diff --git a/csrc/u8x8_display.c b/csrc/u8x8_display.c
@@ -115,6 +115,11 @@ void u8x8_SetContrast(u8x8_t *u8x8, uint8_t value)
  u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SET_CONTRAST, value, NULL); 
 }
 
+void u8x8_SetBacklightColor(u8x8_t *u8x8, uint32_t color)
+{
+ u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_SET_BACKLIGHT_COLOR, 0, &color);
+}
+
 void u8x8_RefreshDisplay(u8x8_t *u8x8)
 {
  u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_REFRESH, 0, NULL); 
@@ -162,4 +167,4 @@ void u8x8_ClearLine(u8x8_t *u8x8, uint8_t line)
  tile.tile_ptr = (uint8_t *)buf; /* tile_ptr should be const, but isn't */
  u8x8->display_cb(u8x8, U8X8_MSG_DISPLAY_DRAW_TILE, u8x8->display_info->tile_width, (void *)&tile);
  } 
-}
+}